create or replace view emp_dept_ve

(empno,ename,job,hiredate,sal,dname,loc)  AS
select e.empno,e.ename,e.job,e.hiredate,e.sal, d.dname,d.loc
from emp e
left join dept d on d.deptno = e.deptno
; 

-- emp_dept_ve 是给视图取的视图名

第二种方法

create or replace view emp_dept_ve as
select e.empno,e.ename,e.job,e.hiredate,e.sal, d.dname,d.loc
from emp e
left join dept d on d.deptno = e.deptno;